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Physics · 2022 · 3 marks
CBSE 2022 · Region 1 · Set 1 · Q7
Explain with the help of a suitable diagram, the phenomenon on which an optical fibre works. Mention any two uses of optical fibres.
Explain with the help of a suitable diagram, the phenomenon on which an optical fibre works. Mention any two uses of optical fibres.
Marking-scheme solution
An optical fibre works on the principle of Total internal reflection.
Alternatively
Uses of optical fibres
Alternatively
Uses of optical fibresi) Medical and optical examination (endoscopy).
ii) Transmission and reception of signals
iii) Photometric sensors.
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CBSE Class 12 Physics past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.